Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1996-05-31
1998-06-09
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327 3, H03L 500, H03D 1300
Patent
active
057640947
ABSTRACT:
The level shift circuit of this invention includes two reference voltage level generation devices, and a difference between two reference voltage levels generated by these reference voltage level generation devices is used as a level shift voltage to be analog-added to an input analog signal. At least one of the two reference voltage level generation devices has a function to change the reference voltage level thereof in accordance with a supplied offset voltage adjusting signal, thereby changing the level shift voltage to be analog-added to the analog signal in accordance with the offset voltage adjusting signal. Thus, the level shift circuit achieves a function to adjust an offset voltage. When this level shift circuit is applied to a signal waveform generator, there is no need to provide the offset voltage adjusting function to a D/A converter. As a result, the power consumption as well as the circuit area of the signal waveform generator can be decreased.
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patent: 5617045 (1997-04-01), Asahina
Proceedings of the IEEE 1994 Custom Integrated Circuits Conference, May 1-4, 1994.
Callahan Timothy P.
Matsushita Electric - Industrial Co., Ltd.
Nu Ton My-Trang
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